CN1689934A - Film for protecting mother glass for flat panel display and use thereof - Google Patents
Film for protecting mother glass for flat panel display and use thereof Download PDFInfo
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- CN1689934A CN1689934A CNA2005100659842A CN200510065984A CN1689934A CN 1689934 A CN1689934 A CN 1689934A CN A2005100659842 A CNA2005100659842 A CN A2005100659842A CN 200510065984 A CN200510065984 A CN 200510065984A CN 1689934 A CN1689934 A CN 1689934A
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- mother glass
- film
- flat panel
- panel display
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
- B26D3/28—Splitting layers from work; Mutually separating layers by cutting
- B26D3/283—Household devices therefor
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/25—Devices for grating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G49/00—Conveying systems characterised by their application for specified purposes not otherwise provided for
- B65G49/05—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles
- B65G49/06—Conveying systems characterised by their application for specified purposes not otherwise provided for for fragile or damageable materials or articles for fragile sheets, e.g. glass
- B65G49/068—Stacking or destacking devices; Means for preventing damage to stacked sheets, e.g. spaces
- B65G49/069—Means for avoiding damage to stacked plate glass, e.g. by interposing paper or powder spacers in the stack
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D2210/00—Machines or methods used for cutting special materials
- B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Forests & Forestry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Liquid Crystal (AREA)
- Laminated Bodies (AREA)
- Packaging Frangible Articles (AREA)
Abstract
An object of the present invention is to provide a surface protecting film which dramatically improves an efficiency of transporting and storing a mother glass, has better peelability from an adherend when peeled without polluting a mother glass surface, and gives reinforcing effect by adopting a pressure-sensitive adhesive protecting film, and use thereof. This invention relates to a film for protecting a mother glass for a flat panel display having a pressure-sensitive adhesive layer on one side of a film substrate, wherein a surface roughness Ra of the pressure-sensitive adhesive layer is 0.2 mum or smaller, and a surface roughness Rz is 1.0 mum or smaller, and wherein the pressure-sensitive adhesive layer comprises a crosslinked copolymer containing a (meth)acrylic acid ester monomer and a vinyl-based monomer having a functional group as a component, and a glass transition temperature of the copolymer obtained by a Fox's equation is -25 to -10 DEG C.
Description
Technical field
The present invention relates to be used for to protect the surface of the mother glass that uses in the manufacturing of various read out instruments etc. film for protecting mother glass for flat panel display, and uses thereof, especially the technology of carrying as being used to protect mother glass is useful.
Background technology
In the manufacturing of flat-panel monitors such as Liquid Crystal Display (LCD), Plasmia indicating panel, organic EL demonstration, use glass substrate, but circulate (carrying) as mother glass, be processed into glass substrate at the glass board of workshop manufacturing.When because of carrying, the keeping of mother glass and then the keeping of following transporting of dispatching from the factory, client etc. when making glass surface impaired, becoming effective rate of utilization reduces, quality is caused dysgenic reason, therefore, can adopt the maintenance shape that glass surface is not in contact with one another usually.
For this reason,,, prevent mother glass surface contact each other, at this moment, mainly can utilize expansion-molded article by forming slot-shaped groove and every mother glass being fixed on the groove about the carrying or the keeping of mother glass.
Roughly have 2 kinds in the packing formed products that uses at present, a kind of is to form groove with box packing container in case, by at its fixed sample glass and add a cover the form that seals packing.Another kind also is L word liner, this method is the groove that forms fixed sample glass in the inboard of the foam molding of L font, this L font foam molding is configured on four angles of the mother glass of tying up basic packing sheet number (for example 20), and bundlees with belt etc. it is fixed.
Any packing state all has advantage, shortcoming, for example if estimate with the purification grade, then the foam molding of L font is being favourable aspect the cleaning easiness, but from the stability of packing, operation easily, box is favourable, can separately use according to the priority of final purpose and client's use.
But, follow the maximization of flat-panel monitor in recent years, also require the maximization of mother glass, carrying, keeping about the mother glass that maximized are difficult to carry out correspondence by aforesaid packing form.Specifically, difficulty is cleaned in the purification of big expansion-molded article, in addition, and for L font packing material, because sealing is used ethene bag with outer packing, so be difficult to obtain sack with purifying hierarchical management.In addition,, the placement sheet number of glass in the space of relative per unit volume is reduced from the viewpoint of cost, the non-constant of efficiency of loading, and increase relevant with logistics cost.In addition, perhaps owing to increase considerably the weight of mother glass, also there is the problem of intensity aspect in this expansion-molded article self also because of the boundary of large scaleization near the foaming precision.Reinforcing metal bar etc. becomes more complicated and large-scale situation, and the result is difficult to acquisition and becomes high priced line.
In order to eliminate this problem, propose sample to be peeled off the method for packing, piling up and carrying (open with reference to the spy flat 11-1205 communique, spy are opened the 2003-237833 communique, the spy opens the 2003-273189 communique) with plastic sheeting.Particularly open to disclose in the flat 11-1205 communique fine concavo-convex processing is carried out to prevent to produce static or scratch in the surface of film the spy.
But non-bonding sheet or packing by similar these methods are accompanied by the maximization of mother glass, occur easily with the friction of mother glass or stagger.For this reason, even under the situation of using the film that has carried out concavo-convex processing, have boundary aspect generation of static electricity that prevents mother glass or the scratch.In addition, by non-bonding sheet or packing, dust etc. are got involved easily, and the operability of mother glass or its sandwich is also good hardly, and the consolidation effect of glass does not almost have yet.
On the other hand, also carry out between mother glass, putting into the packing paper of plastic sheeting (opening the 2003-226354 communique) or paper with reference to the spy.But, in this method, when mother glass is peeled off packing paper, the pollution problems of worrying to have the paper powder of the additive that contains in the plastic sheeting or paper to be caused.
Summary of the invention
Therefore, the object of the present invention is to provide by make have fusible protective film the transporting of mother glass, the leap of keeping efficient are improved and not contaminated samples glass the surface and when peeling off the fissility from the bur good, can also obtain surface protective film of consolidation effect and uses thereof.
Present inventors etc. in order to achieve the above object, especially the anti fouling performance on mother glass surface is concentrated on studies, found that, the adhesives that has the glass temperature of particular range by use also fully reduces the surface roughness Ra and the roughness of surface Rz of adhesive phase, can achieve the above object, thereby finish the present invention.
Promptly; film for protecting mother glass for flat panel display of the present invention; it is characterized in that; in the surface roughness Ra that has adhesive phase, its adhesive phase on the single face of film substrate is below the 0.2 μ m and roughness of surface Rz is below the 1.0 μ m; above-mentioned adhesive phase contains the cross-linking agent of copolymer; described copolymer contains (methyl) acrylate monomer and has functional group's vinyl monomer as constituent, and the glass temperature of the above-mentioned copolymer of being obtained by the Fox formula is-25～-10 ℃.
Fox formula: 1/Tg=∑ (Wn/Tgn)
[in the formula, the glass temperature of Tg (K) expression copolymer, Wn (-) represents the weight rate of each monomer, and Tgn (K) expression is based on the glass temperature of the homopolymer of each monomer, and n represents the kind of each monomer.]
For the present invention, " mother glass for flat panel display " is the glass board of the state that can place in the circulation before being processed into various products, is meant the member that uses in the manufacturing of flat-panel monitor.As flat-panel monitor, can the illustration Liquid Crystal Display (LCD), read out instrument such as plasma panel, OLED display.
By protective film of the present invention, make fusible protective film, so be difficult to produce with the friction of mother glass or stagger; dusts etc. also are difficult to get involved; so preventing that aspect the scratch be actv., in addition, the operability of mother glass or its sandwich is also good.Consequently can make the efficient of transporting, take care of of mother glass obtain the leap improvement.In addition, also the physics consolidation effect can be obtained,,, also deflection, crackle etc. can be effectively prevented for the maximization of mother glass so can prevent the deflection of mother glass.And, have by use particular range glass temperature adhesives and the surface roughness Ra and the roughness of surface Rz of adhesive phase be controlled in the above-mentioned scope, surface that can contaminated samples glass, the fissility when peeling off from the bur is good.
In above-mentioned, be below the 0.2 μ m and roughness of surface Rz is the spacer below the 1.0 μ m and is coiled into drum-shape preferably in the surface roughness Ra that attaches stripping surface on the above-mentioned adhesive phase.When using this spacer, peeling off and using under the situation of protective film, the surface roughness Ra and the roughness of surface Rz of adhesive phase can be controlled in the above-mentioned scope, thereby can obtain aforesaid action effect more infalliblely.
On the other hand, the method for carrying of mother glass of the present invention is characterized in that, the adhesive bonding property face of above-mentioned film for protecting mother glass for flat panel display is attached on the single face at least of mother glass, and its stacked majority is carried.The method for carrying of mother glass of the present invention uses the protective film of the present invention of the aforesaid action effect of performance; so that the transporting of mother glass, keeping efficient obtain leap and improve; and the surface to mother glass does not pollute; fissility when peeling off from the bur is good, and then can also obtain consolidation effect.
In above-mentioned, when being pasted with the mother glass of above-mentioned protective film, also can make the film after clamping has concavo-convex processing stacked.At this moment, can make the connecting airtight property reduction between the mother glass that attaches protective film, further improve the operability of mother glass.In general, if concavo-convex processing is carried out at the back side of protective film, then on the adhesive bonding property face, also be easy to generate concavo-convexly, be easy to generate the residual problem of paste based on the increase of roughness of surface.Therefore, not implementing concavo-convex processing on the base material of protective film, and make the film after the concavo-convex processing of its clamping, is unusual actv. in the present invention.
On the other hand, the mother glass that has protective film of the present invention is that adhesive bonding property face with film for protecting mother glass for flat panel display of the present invention is attached on the single face at least of mother glass.In addition, mother glass sandwich of the present invention is that adhesive bonding property face with film for protecting mother glass for flat panel display of the present invention is attached on the single face at least of mother glass and its majority is stacked.So; owing to attach the protective film of the present invention of the aforesaid action effect of performance, institute is so that the transporting of mother glass, keeping efficient obtain the leap improvement, and the surface of mother glass do not polluted; fissility when peeling off from the bur is good, and then can also obtain consolidation effect.
Description of drawings
Fig. 1 is the section-drawing of an example of the running condition of expression film for protecting mother glass for flat panel display of the present invention.
Fig. 2 is the section-drawing of other examples of the running condition of expression film for protecting mother glass for flat panel display of the present invention.
The specific embodiment
Below, with reference to the description of drawings embodiments of the present invention.Fig. 1 is the section-drawing of an example of the running condition of expression film for protecting mother glass for flat panel display of the present invention.Fig. 2 is the section-drawing of other examples of the running condition of expression film for protecting mother glass for flat panel display of the present invention.
As shown in Figure 1, film for protecting mother glass for flat panel display of the present invention is to have adhesive phase 2 on the single face of film substrate 3, its adhesive bonding property face 2a is attached on the single face at least of mother glass 1 and uses.This adhesive phase 2 contains the cross-linking agent of copolymer, and described copolymer contains (methyl) acrylate monomer as constituent and has functional group's vinyl monomer.
As (methyl) acrylate monomer, can be exemplified as (methyl) alkyl acrylates such as methyl acrylate, methyl methacrylate, ethyl acrylate, EMA, propyl acrylate, propyl methacrylate, butyl acrylate, butyl methacrylate, Hexyl 2-propenoate, hexyl methacrylate, 2-ethyl hexyl acrylate, 2-Propenoic acid, 2-methyl-, octyl ester, acrylic acid ester in the ninth of the ten Heavenly Stems, nonyl methacrylate, dodecylacrylate, lauryl methacrylate etc.
These moieties can be the straight chain shapes, also can be chains.In addition, these (methyl) acrylate monomers can be used alone, and can also make up more than 2 kinds and use.
As vinyl monomer with functional group, can be exemplified as the vinyl monomer that acrylic acid, methyl acrylic acid, itaconic acid, crotonic acid, maleic acid etc. have carboxyl, carboxylic vinyl monomers such as (methyl) acrylic acid 2-hydroxyl ethyl ester, (methyl) acrylic acid 2-hydroxypropyl acrylate, the own ester of (methyl) acrylic acid 2-hydroxyl etc.
These vinyl monomers can use a kind separately, can also make up more than 2 kinds and use.
Content with vinyl monomer of functional group is preferably 0.5～10 mole of % in the whole monomer that constitutes copolymer.When this content during less than 0.5 mole of %, can't carry out full cross-linkedly to copolymer by crosslinking agent described later, the insoluble ratio of the solvent of adhesive phase reduces, and when peeling off protective film, it is residual to occur paste easily on the surface of mother glass.On the other hand, when surpassing 10 moles of %, the trend of initial stage tackiness deterioration is arranged.From this viewpoint, preferred 1～8 mole of % of this content.In the present invention, can be further other vinyl monomers of not having the functional group etc. be used as copolymer composition.
The copolymer of above-mentioned (methyl) acrylate monomer and the above-mentioned vinyl monomer with functional group can pass through known method manufacturing in the past.In addition, as required, can use polymerization initiator etc.
In the present invention, the glass temperature of the above-mentioned copolymer of being obtained by the Fox formula is-25～-10 ℃, preferred-23～-12 ℃.When this glass temperature was lower than-25 ℃, binding power excessively increased, and is difficult to peel off from mother glass.On the contrary, when this glass temperature is higher than-10 ℃,, can't bring into play effect as the defencive function of mother glass from the adhesive phase initial stage binding power deficiency at normal temperatures that this copolymer obtains.
Fox formula: 1/Tg=∑ (Wn/Tgn)
[in the formula, the glass temperature of Tg (K) expression copolymer, Wn (-) represents the weight rate of each monomer, and Tgn (K) expression is according to the glass temperature of the homopolymer of each monomer, and n represents the kind of each monomer.]
Here, be known according to the glass temperature Tgn (K) of the homopolymer of each monomer according to various documents, but in the present invention, each monomer of table 1 adopt the value of table 1.Wherein, for other monomers, when the numerical value that does not have numerical value or document in the document is inconsistent, adopt the value of measuring by general heat analysis such as differential thermal analysis method or dynamic viscoelastic mensuration.
Table 1
| Monomer | Contracted notation | Homopolymer Tg (K) |
| Methyl acrylate | ??MA | ??281 |
| Ethyl acrylate | ??EA | ??251 |
| Isopropyl acrylate | ??i-PA | ??268 |
| N-butyl acrylate | ??BA | ??219 |
| 2-EHA | ??2EHA | ??203 |
| Methyl methacrylate | ??MMA | ??378 |
| EMA | ??EMA | ??338 |
| Isopropyl methacrylate | ??i-PMA | ??354 |
| N-BMA | ??BMA | ??293 |
| Isobutyl methacrylate | ??i-BMA | ??340 |
| The just own ester of methyl acrylic acid | ??HMA | ??268 |
| Lauryl methacrylate | ??LMA | ??208 |
| Acrylic acid | ??AA | ??379 |
| Methyl acrylic acid | ??MAA | ??403 |
| Acrylic acid 2-hydroxyl ethyl ester | ??2HEA | ??258 |
| Hydroxypropyl acrylate | ??HPA | ??266 |
| Methyl acrylic acid 2-hydroxyl ethyl ester | ??2HEMA | ??328 |
| Hydroxy propyl methacrylate | ??HPMA | ??299 |
| Maleic acid | ??IA | ??403 |
| Acrylamide | ??AAm | ??426 |
| Diacetone acrylamide | ??DAAM | ??338 |
| Epihydric alcohol methylpropenoic acid ester | ??GMA | ??314 |
| Styrene | ??St | ??373 |
| Vinyl acetate | ??Vac | ??303 |
| Acrylonitrile | ??AN | ??373 |
In the present invention, constitute adhesive phase, but this crosslinked preferably reaction with crosslinking agent by the functional group who makes above-mentioned vinyl monomer is carried out by the crosslinked above-mentioned copolymer of crosslinking agent.
This crosslinking agent be have at least more than 2 can with the cmpd of the group of functional group's reaction of above-mentioned vinyl monomer, can be exemplified as multi-functional isocyanate compounds such as trimethylolpropane benzal diisocyanate, methylene diisocyanate class; Four diglycidyl m-xylene diamines, four diglycidyls-1, poly epihydric alcohol amines such as the two amino methyl cyclohexanes of 3-, four diglycidyl diaminodiphenyl-methanes, three-glycidyl para-aminophenol, 2-glycidyl aniline, 2-glycidyl ortho-aminotoluene etc.These crosslinking agents can use a kind separately, also can make up more than 2 kinds and use.
The use level of above-mentioned crosslinking agent is different and different according to the content of the vinyl monomer with functional group that uses in the above-mentioned copolymer, but with respect to copolymer 1 00 weight portion, preferred 1～10 weight portion, more preferably 2～8 weight portions.When this use level during less than 1 weight portion, copolymer does not have full cross-linked, and the insoluble ratio of the solvent of adhesive phase reduces, and has to occur the residual trend of paste easily.On the contrary, when this use level surpassed 10 weight portions, the initial stage binding power of adhesive phase had not enough trend.
And then in adhesive phase, can suitably add known in the past various additives such as powdery objects such as known in the past various tackifier or antistatic material, surface lubricant, levelling agent, oxidation inhibitor, anticorrosive, light stabilizer, ultraviolet absorbent, polymerization inhibitor, organosilane coupling agent, inorganic or organic filler, metal powder, pigment, granular, paper tinsel shape thing.
As the film substrate that in surface protective film of the present invention, uses; can use plastic sheeting, but be not particularly limited by manufacturings such as normally used polypropylene, high density polyethylene (HDPE), low density polyethylene (LDPE), medium density polyethylene, straight-chain low density polyethylene, polyethylene terephthalate, ethene-alpha-olefin copolymers.
Preferred 10～300 μ m of the thickness of film substrate, more preferably 30～100 μ m.If such thickness range, when being used for large-scale mother glass, the reinforcement performance of the attaching of protective film or operability of peeling off or glass is good, and can obtain to prevent glass processing or the effect of the damage when transporting.
For the formation method of adhesive phase on film substrate, can adopt known method in the past, but preferably after coating contains the solution of binding compositions of above-mentioned copolymer and crosslinking agent, make the crosslinked method of said composition by processing such as heating.
In the present invention, so the surface roughness Ra of the adhesive phase of making is that the following and roughness of surface Rz of 0.2 μ m is below the 1.0 μ m, importantly makes the Ra of adhesive layer surface and Rz in above-mentioned number range and deposit.For the present invention, Ra and Rz are defined as the value with method measurement described later.
When surface roughness Ra surpasses 0.2 μ m, on glass surface, there is granular pollutants residual, when Rz surpasses 1.0 μ m, on glass surface, also there is particulate contaminant residual.According to this viewpoint, as Ra, be preferably below the 0.1 μ m, as Rz, be preferably below the 0.5 μ m.
In the present invention, for the roughness of surface that makes adhesive phase in above-mentioned number range, can illustration: form the back at adhesive phase and can be set in film or thin slice in the above-mentioned number range to the roughness of surface of adhesive phase by being fitted on the adhesive phase, spacers etc. (surface configuration of these films etc. can make the roughness of surface of adhesive phase in particular range) are fitted in the method on the adhesive phase, perhaps, the surface roughness Ra of adhesive layer surface is being set in when being coiled into drum-shape method in the above-mentioned scope etc. by the configuration of surface of control substrate backside.At this moment, the surface roughness Ra that preferably is fitted in the surface on the adhesive phase is below the 0.2 μ m and roughness of surface Rz is below the 1.0 μ m, and more preferably Ra is that 0.1 μ m is following, Rz is below the 0.5 μ m.
Protective film of the present invention preferably attaches on stripping surface to have the spacer of above-mentioned roughness of surface and to coil into tubular.Base material as spacer has paper, plastic sheeting, still from the viewpoint of surface smoothing excellence, preferably uses plastic sheeting.
As this film; if can protect the film of above-mentioned adhesive phase; then be not particularly limited, can be exemplified as polyethylene foil, polypropylene film, polybutene film, poly-butadiene film, poly-methyl pentene film, polyvinyl chloride film, vinyl chloride copolymer film, pet film, polybutylene terephthalate film, polyurethane film, ethylene-vinyl acetate copolymer film etc.
The thickness of spacer is generally 5～200 μ m, about preferred 10～100 μ m.The adhesive phase attaching face of spacer is implemented to utilize the suitable mold release of the mold release, silicon dioxide powder etc. of silicone, fluorine class, chain alkyl class or fatty acyl amide handle.
From the viewpoint to the tackiness of glass surface, preferred 0.1～30 μ m of the thickness of the adhesive phase of protective film of the present invention, more preferably 0.5～20 μ m.
On the other hand, as shown in Figure 1, the mother glass of band protective film of the present invention is the adhesive bonding property face 2a that attaches aforesaid protective film on the single face at least of mother glass 1.Fig. 2 is illustrated in the two-sided situation that goes up the applying protective film.
As the mother glass 1 that flat-panel monitor is used, can preferably use the glass of making by katabatic drainage method, fusion method, suspension method etc.In addition, roughness of surface Rmax is preferably below the 30nm, is preferably below the 10nm especially.In addition, the preferred alumina silicate glass of the composition of glass, sodium aluminum silicate glass, soda lime glass, pyrex etc.Especially, even the mother glass that uses in the manufacturing of read out instruments such as Liquid Crystal Display (LCD), Plasmia indicating panel, OLED display by the present invention, can adapt to the requirement of maximizing in recent years.The present invention is that 0.3～0.7mm and long limit and minor face all are that mother glass more than the 1000mm is effective for thickness particularly.
The attaching of protective film can be undertaken by following method etc., promptly utilizes at glass and transports the cylinder pressurization that is provided with on the line and method, the method for using hand roller that attaches, use the method for the stacked machine of adding pressure type etc.
As shown in Figure 2, for mother glass sandwich of the present invention, be that adhesive bonding property face 2a with above-mentioned protective film is attached on the single face at least of mother glass 1 and with its stacked majority.In illustrated embodiment (state before stacked), when laminated samples glass 1, on it is two-sided, attach protective film, make the concavo-convex processing film 4 of implementing concavo-convex processing mediate.
In the present invention, also can omit concavo-convex processing film 4, but when making concavo-convex processing film 4 mediate, the mother glass adhesiveness each other that has attached protective film be reduced, and further improve the operability of mother glass.Wherein, in the present invention,, also can make packing paper or other padded coamings mediate in order to keep the purification grade on the surface of mother glass 1 by protective film.
As concavo-convex processing film 4, can enumerate the film that carries out embossing processing, implement to foam the film handled, by sandblast, abrasive roller, chemical treatment etc. surface coarsening film, contain particulate and form rough film etc.Concavo-convex processing film 4 can be a porous plastid.
For the method for carrying of mother glass of the present invention, as described above the adhesive bonding property face 2a of protective film is attached on the single face at least of mother glass 1 and and carries its stacked majority.Except attach protective film of the present invention or preferably make the film of having implemented concavo-convex processing mediate, identical with the method for carrying of in the past mother glass, can both adopt any in the past method.
Embodiment
Below, embodiment of concrete expression formation of the present invention and effect etc. is described.Wherein, Ci Shi assessment item is measured by as described below.
1) glass temperature of copolymer (Tg)
Obtain by following Fox formula.
Fox formula: 1/Tg=∑ (Wn/Tgn)
[in the formula, the glass temperature of Tg (K) expression copolymer, Wn (-) represents the weight rate of each monomer, and Tgn (K) expression is based on the glass temperature of the homopolymer of each monomer, and n represents the kind of each monomer.] Tgn (K) adopts the value of table 1.
2) initial stage binding power
Use stacked machine with pressure 8kg/cm (line pressure conversion), speed 0.3m/ minute crystal liquid substrate with mother glass on the coating surface protective film.After preventing 30 minutes under the room temperature, will be with draw speed 0.3m/ minute, peeling force during 180 ° of stripper surface protective films of angle as the initial stage binding power.Crystal liquid substrate is shaped by the katabatic drainage method with mother glass, and to make its roughness of surface Rmax be below the 10nm by freely grinding.In addition, glass consists of the alumina silicate glass of alkali-free.
3) peeling force
Use stacked machine with pressure 8kg/cm (line pressure conversion), speed 0.3m/ minute crystal liquid substrate with mother glass on the coating surface protective film.Subsequently, keeping is 3 days in 50 ℃ hot air circular drying machine, be cooled to room temperature after, measure with draw speed 0.3m/ minute, peeling force during 180 ° of stripper surface protective films of angle.
4) surface finish measurement
For the roughness of the adhesive surface of studying surface protective film, use the surface texture measurer to observe.According to result of a measurement, obtain arithmetic average roughness (Ra) and 10 mean roughness (Rz).With sample be cut into about 1cm square after, be fixed on the glass board with Acrylic Foam Tape, at room temperature implement steam dyeing with 2% the ruthenic acid aqueous system and handled 10 minutes, carry out surface shape measuring then.
The surface shape measuring device uses KLA-TencorP-11, is that measurement length 200 μ m, scanning speed 400 μ m/sec, scanning times 100 (20 μ m at interval), load 3mg carry out with the measuring condition.
5) particulate residues on bur surface is measured
As bur, use the crystal liquid substrate mother glass.The various surface protective films of fitting thereon are with 3) peel off protective film under the identical condition, measure the granule number of 0.28～10 μ m then.Analytical equipment uses Hitachi's electronic engineering (strain) system LS-5000.Wherein, nearly all particle all causes by paste is residual.
Possessing cooling pipe, leading in the reaction vessel of nitrogen pipe, heat indicator, mixing device, throw in butyl acrylate 68 weight portions, methyl methacrylate 29 weight portions, acrylic acid 2-hydroxyl ethyl ester 3 weight portions, as 2 of polymerization initiator, two (2-amidine propane) bichloride 0.1 weight portions of 2 '-azo, as neopelex 1.5 weight portions and water 100 weight portions of emulsifying agent, 80 ℃ of following emulsion polymerizations 5 hours, ammoniacal liquor with 15 weight % is adjusted to 7.0 with pH, and obtaining solid constituent is the copolymer emulsion of 50 weight %.
With hydrochloric acid this emulsion is saltoutd,, obtain acrylic copolymer with after washing, drying.This acrylic copolymer is dissolved in the toluene,, in this solution, adds trimethylolpropane benzal diisocyanate 3 weight portions, mix, make binding compositions solution with respect to solid constituent 100 weight portions of acrylic copolymer.
Implemented at single face on the polyethylene foil of thick 60 μ m of corona treatment; applying this solution and dried coating is 10 μ m; use 80 ℃ dry 3 minutes of drier then; form adhesive phase; the polyethylene foil of coating surface roughness Ra=0.01 μ m, Rz=0.06 μ m obtains surface protective film thereon.
Except surface roughness Ra=0.03 μ m, the Rz=0.17 μ m of the polyethylene foil that is used to fit, obtain showing protective film in the same manner with embodiment 1.
Comparative example 1
Except surface roughness Ra=0.06 μ m, the Rz=0.33 μ m of the polyethylene foil that is used to fit, obtain showing protective film in the same manner with embodiment 1.
Comparative example 2
Possessing cooling pipe, leading in the reaction vessel of nitrogen pipe, heat indicator, mixing device, make 2-EHA 47 weight portions, butyl methacrylate 53 weight portions, acrylic acid 2-hydroxyl ethyl ester 4 weight portions, as azo isodigeranyl butyronitrile 0.1 weight portion of polymerization initiator in toluene, 50 ℃ of following polymerizations 24 hours, obtain the copolymer that solid constituent is 50 weight %.
Then,, add trimethylolpropane benzal diisocyanate 1.5 weight portions, mix, make binding compositions solution with respect to solid constituent 100 weight portions of acrylic copolymer.
Implemented at single face on the polyethylene foil of thick 60 μ m of corona treatment; applying this solution and dried coating is 3 μ m; use 80 ℃ dry 3 minutes of drier then; form adhesive phase; the polyethylene foil of coating surface roughness Ra=0.01 μ m, Rz=0.06 μ m obtains surface protective film thereon.
Comparative example 3
Possessing cooling pipe, leading in the reaction vessel of nitrogen pipe, heat indicator, mixing device, make 2-EHA 20 weight portions, butyl methacrylate 80 weight portions, acrylic acid 2-hydroxyl ethyl ester 4 weight portions, as azo isodigeranyl butyronitrile 0.1 weight portion of polymerization initiator in toluene, 50 ℃ of following polymerizations 24 hours, obtain the copolymer that solid constituent is 50 weight %.
Then,, add trimethylolpropane benzal diisocyanate 1.5 weight portions, mix, make binding compositions solution with respect to solid constituent 100 weight portions of acrylic copolymer.
Implemented at single face on the polyethylene foil of thick 60 μ m of corona treatment; applying this solution and dried coating is 3 μ m; use 80 ℃ dry 3 minutes of drier then; form adhesive phase; the polyethylene foil of coating surface roughness Ra=0.01 μ m, Rz=0.06 μ m obtains surface protective film thereon.
The evaluation result of the above embodiments 1,2 and comparative example 1～3 is as shown in table 2.
Table 2
| | | Comparative example 1 | Comparative example 2 | Comparative example 3 | ||
| The glass temperature of copolymer (℃) | ??-22.3 | ??-22.3 | ??-22.3 | ??-40.0 | ??-9.7 | |
| Initial stage binding power (N/20mm) | ??0.34 | ??0.33 | ??0.11 | ??2.3 | Not 0 (not bonding) | |
| Peeling force (N/20mm) | ??0.12 | ??0.13 | ??0.01 | ??0.6 | Not 0 (not bonding) | |
| Surface finish measurement (μ m) | ??Ra | ??0.05 | ??0.06 | ??0.20 | ??0.06 | ??0.07 |
| ??Rz | ??0.30 | ??0.39 | ??1.14 | ??0.32 | ??0.38 | |
| The particulate residues on bur surface is measured | Individual/78.5cm 2 | ??515 | ??251 | ??4738 | ??8007 | ??492 |
As shown in Table 2, in embodiment 1,2, the quantity of particulate residues is few, and initial stage binding power or peeling force be appropriateness also.To this, in the bigger comparative example 1 of roughness of surface, the quantity of particulate residues is about 10 times, and initial stage binding power or peeling force are also abundant inadequately.In addition, in the low excessively comparative example 2 of glass temperature, the quantity of particulate residues further increases, particularly the problem that is excessively increased by peeling force.On the contrary, in the too high comparative example 3 of glass temperature, there are not initial stage binding power or peeling force, not as the function of protective film.
In an embodiment of the present invention,, can prevent the generation of particle, so can improve the effective rate of utilization that liquid crystal panel is made when when crystal liquid substrate is peeled off protective film with mother glass.Especially, can prevent to produce the above particle of 0.5 μ m, thus compared with the past, improved significantly.
Need to prove that " above, following " in this specification sheets comprises end points.
Claims (6)
1, a kind of film for protecting mother glass for flat panel display is below the 0.2 μ m and roughness of surface Rz is below the 1.0 μ m in the surface roughness Ra that has adhesive phase, this adhesive phase on the single face of film substrate, it is characterized in that,
Described adhesive phase contains the cross-linking agent of copolymer, and described copolymer contains (methyl) acrylate monomer and has functional group's vinyl monomer as constituent, and the glass temperature of the described copolymer of being obtained by the Fox formula is-25～-10 ℃;
Fox formula: 1/Tg=∑ (Wn/Tgn)
In the formula: the glass temperature of Tg (K) expression copolymer, Wn (-) represents the weight rate of each monomer, and Tgn (K) expression is based on the glass temperature of the homopolymer of each monomer, and n represents the kind of each monomer.
2, film for protecting mother glass for flat panel display as claimed in claim 1; it is characterized in that, be below the 0.2 μ m and roughness of surface Rz is the spacer below the 1.0 μ m and is coiled into the cylinder shape in the surface roughness Ra that is pasted with stripping surface on the described adhesive phase.
3, a kind of method for carrying of mother glass for flat panel display; it is characterized in that; the adhesive bonding property face of claim 1 or 2 described film for protecting mother glass for flat panel display is attached on the single face at least of mother glass for flat panel display, and it is a plurality of stacked and carry.
4, the method for carrying of mother glass for flat panel display as claimed in claim 3 is characterized in that, and is a plurality of when stacked when the mother glass for flat panel display that will be pasted with described protective film, makes the film of having implemented concavo-convex processing mediate.
5, a kind of mother glass for flat panel display with protective film is characterized in that, the adhesive bonding property face of claim 1 or 2 described film for protecting mother glass for flat panel display is attached on the single face at least of mother glass for flat panel display.
6, a kind of mother glass for flat panel display sandwich is characterized in that, the adhesive bonding property face of claim 1 or 2 described film for protecting mother glass for flat panel display is attached on the single face at least of mother glass for flat panel display and it is a plurality of stacked.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004125545 | 2004-04-21 | ||
| JP2004-125545 | 2004-04-21 | ||
| JP2004125545A JP4455139B2 (en) | 2004-04-21 | 2004-04-21 | Mother glass protective film for flat panel display and its use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1689934A true CN1689934A (en) | 2005-11-02 |
| CN1689934B CN1689934B (en) | 2010-10-06 |
Family
ID=35308647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2005100659842A Expired - Fee Related CN1689934B (en) | 2004-04-21 | 2005-04-19 | Film for protecting mother glass for flat panel display and use thereof |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20050253277A1 (en) |
| JP (1) | JP4455139B2 (en) |
| KR (1) | KR101085635B1 (en) |
| CN (1) | CN1689934B (en) |
| BE (1) | BE1016833A3 (en) |
| SG (2) | SG116625A1 (en) |
| TW (1) | TW200536761A (en) |
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- 2005-04-19 US US11/109,568 patent/US20050253277A1/en not_active Abandoned
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2005306996A (en) | 2005-11-04 |
| KR20060047274A (en) | 2006-05-18 |
| CN1689934B (en) | 2010-10-06 |
| TW200536761A (en) | 2005-11-16 |
| US20050253277A1 (en) | 2005-11-17 |
| SG136942A1 (en) | 2007-11-29 |
| SG116625A1 (en) | 2005-11-28 |
| BE1016833A3 (en) | 2007-08-07 |
| KR101085635B1 (en) | 2011-11-22 |
| JP4455139B2 (en) | 2010-04-21 |
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